OpenAI Files for US IPO, Marking a Major Milestone for the AI Sector

SAN FRANCISCO — ChatGPT‑maker OpenAI confidentially filed for a US initial public offering on Monday, joining rival Anthropic in a push toward the stock market as investors seek exposure to the booming technology sector.

OpenAI did not disclose the size or terms of the offering, saying a timeline has not yet been determined. “It may be a while because there are things we want to do that are likely easier as a private company,” it said in a statement.

Reuters has reported that the company is targeting a valuation of up to $1 trillion in a debut that could come as early as September. At that level, OpenAI would set the stage for a trio of trillion‑dollar tech IPOs, following Elon Musk’s SpaceX, which filed for a $75 billion offering at a $1.75 trillion valuation.

OpenAI said earlier this year that it was raising $110 billion at an $840 billion valuation from backers including SoftBank, Amazon, and Nvidia. It also disclosed that ChatGPT has more than 900 million weekly active users and over 50 million consumer subscribers.

The filing follows OpenAI renegotiating its partnership with Microsoft, allowing new collaborations with Amazon and Google. In March, the company said it was generating $2 billion in monthly revenue, growing roughly four times faster than earlier internet giants.

Anthropic, a major rival, filed its own confidential IPO on Monday, weeks after raising $65 billion at a $965 billion valuation.

OpenAI was founded in 2015 as a research‑focused nonprofit but created a for‑profit arm in 2019. A US jury in May ruled against early backer Elon Musk in a lawsuit that had accused OpenAI of straying from its original mission, removing a key legal hurdle for the offering.

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